Letta Freemium

Letta, formerly known as MemGPT, is an open-source framework and platform for building stateful AI agents with long-term memory. It lets agents remember users, learn over time, and manage their own context.

Traditional chatbots forget everything between sessions. Letta gives each agent a persistent memory that it curates itself, deciding what to store, recall, and forget. Developers can build, deploy, and monitor these memory-aware agents in the cloud or self-hosted.

Product Features

• Self-editing long-term memory for persistent agents
• Agent Development Environment (ADE) for building and debugging
• REST API and SDKs for Python and TypeScript
• Connections to Slack, Discord, and other tools
• Support for multiple LLM providers
• Open-source core with a managed cloud option

Product Highlights

• Agents that genuinely remember across sessions
• Open source and self-hostable for full control
• Purpose-built memory architecture, not a bolt-on
• Fast path from prototype to production agents

Use Cases

• Building a personal assistant that remembers your preferences
• Creating a support agent with customer history
• Developing research agents that accumulate knowledge
• Prototyping multi-session AI companions
• Deploying stateful agents in Slack or Discord